## Question 1
What are valid substrings of "Educative"?
### Options

1. "tive"
Correct

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2. "ude"
Incorrect
These characters are present in "Educative" but in a different order.
----------------------------

3. "cat"
Correct

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4. "vit"
Incorrect
These characters are present in "Educative" but in a different order.
----------------------------

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## Question 2
In which string is "this" present as a subsequence?
### Options

1. "thims"
Correct
By deleting the character "m", present at index $3$, we can obtain "this".
----------------------------

2. "sih"
Incorrect
These characters are present in "this" but in a different order.
----------------------------

3. "tis"
Incorrect
The character "h" is missing.
----------------------------

4. "hissy"
Incorrect
There is no way to delete characters from this substring to reduce it to "this".
----------------------------

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## Question 3
What is the output if the following strings are given as input?

`str1` = "this is a test string"

`str2` = "tis"
### Options

1. "this"
Correct
If we delete the character "h" from this substring, we will get `str2`.
----------------------------

2. "is a t"
Incorrect
There is no way to delete characters from this substring to reduce it to `str2`.
----------------------------

3. "stri"
Incorrect
There is no way to delete characters from this substring to reduce it to `str2`.
----------------------------

4. "test stri"
Incorrect
There is no way to delete characters from this substring to reduce it to `str2`.
----------------------------

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## Question 4
What is the output if the following strings are given as input?

`str1` = "asbfgedasfbdaaf"

`str2` = "bfd"
### Options

1. ""
Incorrect

----------------------------

2. "bfged"
Correct
If we delete the characters "g" and "e" from this substring, we will get `str2`.
----------------------------

3. "bdaaf"
Incorrect
There is no way to delete characters from this substring to reduce it to `str2`.
----------------------------

4. "fbd"
Incorrect
There is no way to delete characters from this substring to reduce it to `str2`.
----------------------------

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## Question 5
What is the output if the following strings are given as input?

`str1` = "Hello how are you?"

`str2` = "ok"
### Options

1. "ok"
Incorrect
This is not a substring of `str1`.
----------------------------

2. "you"
Incorrect
There is no way to delete characters from this substring to reduce it to `str2`.
----------------------------

3. ""
Correct
Since "ok" does not occur in `str1`, the output will be an empty string.
----------------------------

4. "Hello how are you?"
Incorrect
There is no way to delete characters from this substring to reduce it to `str2`.
----------------------------

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